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When someone invites them self into your home/apt. The origin of this phrase is someone that is unvited barging into your place, but it can also be used for a planned visit.
“We had plans to meet 11pm, but 10:15pm rolls around and I find my friend sitting in my living room uninvited

“You gotta keep your door locked so people don’t Shaina themselves into your place”

— — —

“Hey wanna chill later?”
“Sure I’ll leave the door unlocked, just Shaina yourself in”
by Rivercest April 20, 2018
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